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U.S. CISA adds a flaw in Microsoft Windows to its Known Exploited Vulnerabilities catalog
Winsage
January 14, 2026

U.S. CISA adds a flaw in Microsoft Windows to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a Microsoft Windows vulnerability, CVE-2026-20805, to its Known Exploited Vulnerabilities (KEV) catalog, with a CVSS score of 8.7. This vulnerability, part of the January 2026 Patch Tuesday updates, affects the Windows Desktop Window Manager and allows attackers to leak memory information, potentially aiding in further exploits. Federal Civilian Executive Branch agencies must address this vulnerability by February 3, 2026, as mandated by Binding Operational Directive 22-01.
Windows LNK UI Spoofing Vulnerability Weaponized for Remote Code Execution
Winsage
October 31, 2025

Windows LNK UI Spoofing Vulnerability Weaponized for Remote Code Execution

A cyber espionage campaign targeting European diplomatic institutions has been attributed to the Chinese-affiliated threat actor UNC6384, which exploits the ZDI-CAN-25373 vulnerability in Windows shortcut files. The campaign, noted for its use of social engineering tactics that mimic legitimate diplomatic events, has specifically targeted entities in Hungary, Belgium, and surrounding European nations between September and October 2025. The attack utilizes spearphishing emails with malicious LNK files related to European Commission and NATO meetings, leading to the deployment of PlugX, a remote access trojan. The attack chain involves a weaponized LNK file that executes PowerShell commands to unpack a tar archive containing a malicious DLL and an encrypted payload. UNC6384 employs advanced techniques to evade detection, including dynamic loading of Windows API functions and anti-analysis measures. The malware allows extensive espionage activities and creates hidden directories for persistent access. Recommendations for organizations include disabling automatic LNK file resolution, blocking known command and control domains, and enhancing user training to defend against such threats.
silver Android smartphone
Winsage
October 31, 2025

Windows LNK UI Spoofing Vulnerability Weaponized for Remote Code Execution

A cyber espionage campaign has been launched by the Chinese-affiliated threat actor UNC6384, targeting European diplomatic institutions using a vulnerability in the Windows shortcut (LNK) user interface, identified as ZDI-CAN-25373. This vulnerability was disclosed in March 2025. Between September and October 2025, entities in Hungary, Belgium, and neighboring European nations were specifically targeted. The attack utilizes spearphishing emails with conference-themed LNK files that exploit the Windows vulnerability to execute PowerShell commands, leading to the deployment of the PlugX remote access trojan (RAT). The attack sequence involves a weaponized LNK file that unpacks a tar archive containing a legitimate Canon printer assistant executable, a malicious DLL, and an encrypted payload. The Canon binary, despite being digitally signed, loads the malicious DLL which injects the PlugX payload into memory. The malware employs anti-analysis techniques and creates a hidden directory for persistent access. Recommendations for organizations include disabling automatic LNK file resolution, blocking known command and control domains, and monitoring for DLL side-loading attacks.
Patching required for exploited Windows vulnerability
Winsage
October 22, 2025

Patching required for exploited Windows vulnerability

Microsoft is facing a significant security vulnerability in the Windows Server Message Block (SMB) client, which has been added to the US Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) Catalog. Despite a patch being released, the flaw, designated as CVE-2025-33073 and rated with a CVSS score of 8.8, remains a target for exploitation. The vulnerability allows attackers to connect a Windows system to a malicious SMB server, enabling remote execution of plans with elevated access privileges. CISA has mandated that all federal agencies must install the update by November 10, 2025, and encourages private organizations to assess their patch status and consider temporary measures if immediate updates are not possible.
CISA Issues Warning Over Microsoft Windows Vulnerability Actively Exploited by Attackers
Winsage
October 17, 2025

CISA Issues Warning Over Microsoft Windows Vulnerability Actively Exploited by Attackers

CVE-2025-59230 is a significant vulnerability affecting Microsoft Windows, classified as an improper access control flaw that allows authorized attackers to escalate their privileges on compromised systems. It is embedded within the Windows Remote Access Connection Manager and enables attackers to execute malicious code with elevated rights, access sensitive data, and move laterally across network segments. CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on October 14, mandating federal civilian executive branch agencies to apply security patches by November 4, in accordance with Binding Operational Directive 22-01. Organizations are encouraged to apply Microsoft’s security updates promptly, follow BOD 22-01 guidance, and isolate affected systems if patches cannot be applied.
silver Android smartphone
Winsage
June 18, 2025

XDSpy Threat Actors Leverages Windows LNKs Zero-Day Vulnerability to Attack Windows System Users

A cyber espionage campaign attributed to the XDSpy threat actor has been discovered, exploiting a zero-day vulnerability in Windows shortcut files identified as “ZDI-CAN-25373.” This vulnerability allows attackers to conceal executed commands within specially crafted shortcut files. XDSpy has primarily targeted government entities in Eastern Europe and Russia since its activities became known in 2020. Researchers from HarfangLab found malicious LNK files exploiting this vulnerability in mid-March, revealing issues with how Windows parses LNK files. The infection begins with a ZIP archive containing a malicious LNK file, which triggers a complex Windows shell command to execute malicious components while displaying a decoy document. This command extracts and executes a first-stage malware called “ETDownloader,” which establishes persistence and downloads a second-stage payload known as “XDigo.” The XDigo implant, written in Go, collects sensitive information and employs encryption for data exfiltration. This campaign represents an evolution in XDSpy's tactics, combining zero-day exploitation with advanced multi-stage payloads.
587 Windows Vulnerabilities — A Microsoft Security Record Breaker
Winsage
April 20, 2025

587 Windows Vulnerabilities — A Microsoft Security Record Breaker

Microsoft has reported a record number of 1,360 security vulnerabilities for its products in 2024, marking an 11% increase from 2023. This includes 587 vulnerabilities in Windows (33 classified as critical) and 684 in Windows Server (43 classified as critical). The increase in reported vulnerabilities suggests that security researchers are effectively identifying weaknesses, and Microsoft has invested over a million dollars in bounties to encourage this. The proactive communication and remediation process during Patch Tuesday enhances security, indicating that Microsoft is committed to addressing vulnerabilities rather than being indifferent to user security.
Windows vulnerability with NTLM hash abuse exploited for phishing
Winsage
April 19, 2025

Windows vulnerability with NTLM hash abuse exploited for phishing

A vulnerability in Windows, identified as CVE-2025-24054, is being exploited in phishing campaigns targeting government and private organizations. Initially considered low-risk, it was addressed in Microsoft's March 2025 Patch Tuesday updates. Following the release of these patches, Check Point observed a rise in exploitation attempts, particularly linked to the Russian group APT28. Attackers sent phishing emails with Dropbox links containing .library-ms files, which, when accessed, connected to an external SMB server controlled by the attackers, allowing interception of NTLM hashes. A subsequent wave of attacks involved .library-ms files sent as direct attachments, requiring minimal user interaction to exploit the vulnerability. The malicious ZIP archive also contained files exploiting older NTLM vulnerabilities. Check Point identified the attackers' SMB servers with specific IP addresses. Despite being classified as medium-severity, the vulnerability's potential impact is significant, prompting organizations to apply the March 2025 updates and consider disabling NTLM authentication if not essential.
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